Hoosiers, having been spoiled by this week's near-record warmth, will get a rude awakening beginning Friday, as the leading edge of a vast pool of chilly air pours over Indiana.
This chilly air promises to bring Indiana its lowest temperatures of the season thus far.
Temperatures Friday will hold up to 25 degrees below the balmy upper 70s and lower 80s reached on Thursday.
Put another way, highs will be in the lower to mid-50s in most of northern and central Indiana.
Indianapolis hit 78 degrees on Wednesday, and was expecting at least as high on Thursday. Friday's forecast was for a high of 54 degrees under rainy skies.
The agent for change, a cold front plowing into the Midwest from the Great Plains, will cross the Hoosier State with a band of rain and even thunderstorms Thursday night and early Friday.
Slowing of the front west of the state will allow rainy weather to linger in the afternoon in central and eastern Indiana.
Meanwhile, the coldest weather will not begin until early next week, when all but southernmost Indiana can look forward to highs in the 40s.
Hawaii will escape the worst, but not all of Guillermo's impacts as the tropical storm passes north of the islands Wednesday through Thursday.
A line of violent thunderstorms tore across Massachusetts, including the Boston area, Tuesday afternoon.
A developing storm system will track from the Missouri Valley to the mid-Atlantic through Thursday and produce rounds of showers and thunderstorms with locally heavy rain.
The Northeast will catch a break from heat and humidity for the remainder of the week.
Typhoon Soudelor in the western Pacific Ocean will remain a powerful tropical cyclone this week eventually threatening Taiwan and eastern China.
Two spectators were killed and at least another 32 people were injured Monday evening, as strong storms forced a circus tent to collapse in Lancaster, New Hampshire.
Norfolk, NE (1989)
Early morning thunderstorm brought sustained winds of 60 mph with gusts to 92 mph.
Southern California (1997)
Hurricane Guillerno produced 12 foot waves and strong rip currents. 1 person was killed and 3 others injured in the Newport Beach area.
Severe thunderstorms produced downburst winds of 75-80 mph with isolated reports of nearly 100 mph. I-90 was closed near Janesville, where there was widespread damage.